641418290 has 8 divisors (see below), whose sum is σ = 1154552940. Its totient is φ = 256567312.

The previous prime is 641418263. The next prime is 641418293. The reversal of 641418290 is 92814146.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 590538601 + 50879689 = 24301^2 + 7133^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×641418290² = 822834845493048200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641418290.

It is not an unprimeable number, because it can be changed into a prime (641418293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32070905 + ... + 32070924.

Almost surely, 2^641418290 is an apocalyptic number.

641418290 is a deficient number, since it is larger than the sum of its proper divisors (513134650).

641418290 is a wasteful number, since it uses less digits than its factorization.

641418290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64141836.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 641418290 is about 25326.2371859698. The cubic root of 641418290 is about 862.4099924278.

The spelling of 641418290 in words is "six hundred forty-one million, four hundred eighteen thousand, two hundred ninety".